-7.5% is the change from 880 to 814
Calculation steps:
[( 814 - 880 ) ÷ 880] x 100 = -7.5%
Formula
Percentage change = [(814 - 880) / 880] x 100
Subtract the new number by the original number
814 - 880 = -66
-66 ÷ 880 = -0.075
-0.075 x 100 = -7.5%
Example